/*************************************************************************
    > File Name: exercise2.cpp
    > Author: Botao
    > Mail: peng.botao@aliyun.com 
    > Created Time: Thu 11 Nov 2021 03:17:34 PM CST
 ************************************************************************/
#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <string>

int main(){
    
    return 0;
}